Remove TypeScript

> Fully recognize that TypeScript offers some people some advantages, but to my eyes, the benefits are evident in this PR. The code not only reads much better, it's also freed of the type wrangling and gymnastics needed to please the TS compiler.

This is such a terrible take. The same could be said about removing tests. It does simplify things, and not having to please the damn test suite is indeed a boon for productivity. You get to drive at full speed towards the cliff.

Strong typing is a hill I'm willing to die on, and at Svix we encode everything we humanly can in the type system. Let the compiler catch our mistakes...

One advantage of going to JsDoc type annotations for some libraries is that you don't need to deal with sourcemaps. People can use the source code as-is and they can bundle and minify it if they like.

That doesn't seem to be what this is about, though.

I grew up on JavaScript and usually enjoy it, and also adopted TypeScript and usually get along with it.

I'd find it difficult to contribute to an enterprise Angular project without static typing, and definitely found the refactor to static typing/react from a legacy Angular 1.x project quite challenging. But, I don't know that it's ever truly helped me move faster, and does often get in the way. It's a formality, and formality adds latency. When you go out for dinner, you can go casually and all you have is transit time. When you go out formally, you need to dress up, put on a tie perhaps, do your makeup, hair, all this extra stuff. You might find it's worth it, maybe you enjoy the whole production, and otherwise they'd not let you into a fancy place. Likewise with static typing, you might get the benefit if someone changing your code or integrating finds that the path is more clear because of the type hints. Maybe you introduce less bugs because you've been alerted to missing null checks. But not necessarily, you trade time for a hopefully more consistent experience.

Meh, this debate is already long over. Every TypeScript alternative/competitor is dead. Most developers who are staunchly against TS types and compile steps for their JS code still probably end up relying on TypeScript via their editor's intellisense/language support even if they don't know it.